Catherine Brown is an Environmental Scientist and serves as a Remedial Project Manager in the Superfund program at EPA Region 9. She is currently supervising the cleanup activities on the PGA-North and PGA-South Superfund sites. Previously, Catherine served as a chemist and environmental investigator enforcing environmental laws such as the Clean Air Act, the Safe Drinking Water Act, NPDES permitting program, etc. She has also served as a program manager in EPA's ambient air monitoring program, overseeing the criteria air pollutant and air toxics monitoring projects. Catherine has been with EPA since 1990.